Gearing



Av RU ETSCHI Aug. 4, 1931.

GEARING Filed May 15, I950 2 Sheets-Sheet l A. RUETSCHI Aug. 4, 1931.

GEARING Filed May 15, 1930 2 Sheets-Sheet 2 2534 /ZM,Z/ M POI/ uPatented Aug. 4, 1931 PATENT OFFICE AR NOLD RUETSGHI, OE LAKEWOOD, OHIOGEARING H Application filed May 15,

This "invention relates to a gearing assembly and has for its object toprovide a gear and pinion adapted to mesh therewith H which will providea degree of flexibility and overcome friction while attainingcomparative simplicity and manufacturing economy. l r

' ith these and other objects in view, the I invention consists indetails of construction and arrangement of parts as hereinafterdescribed'andclaimed. v r

,Fig, 1 is a side view showing the gear and pinion in mesh ,Fig. 2 is aplan View of the I assembly o Fig. l'and Fig. 3 is a plan View of thegear alone. v

Y The gear comprises acentral disk 10 provided' with a hub portion 11which is centrally' drilled to receive aishaft and provided with a keway 12 for" keying such shaft thereto. 'I he periphery of the centraldisk 10 is bifurcatedl'to provideia groove 13 for the lreception oftooth members 14, which are composed of body portions specifically Mindicated by numeral 1 1 and radially ex tending cylindrical portions15.The inner end'of'each body portionlt is drilled (to receiveapin116.which extends through the bifurcation of the member 10andthrough the opening inthe tooth members 14L. It

will'be' obvious from the drawings that the cylindrical portions 15ektend in opposite directions on adjacent tooth members. S The pinioniscomposed ofia central sleeve 17 hav ng flanges 18 integral therewith,and

making up therewith a spool. The spool is provided with a'suitablekeyway 19 for keying the same to a shaft. A plurality of tooth pins 20are journaled, by means of ball or roller bearings, ing'the flangesYlSand extend inwardly .toward the other flange, The pins in each flangeare spaced. apart about thedistance that would be required to receiveanother: pin 'therebetween, and the pins on the opposite Iflange aresimilarly spaced, but the. pins on-thetwo flanges are staggered. H i

It will be 'evident'from the drawings that theinner ends" of the toothpins 20 are spacedapart a distancesufiicient .to receive therebetweenthe body portion 14 of the 1930. Serial No. 452,770.

tooth members on the gear. The tooth pins on the pinion-are so spacedand positioned that the projections of all said tooth pins, that is onboth flanges, when projected upon a plane perpendicular to the axis ofthe spool will constitute a complete ring of tangent circles, thecenters of all such circles lying on the circumference of a single largecircle, the center of which is on the axis of the spool. v I

I may provide openings in adjacent tooth members, as best seen in Fig.1, which will register and which may receive a small coil' spring 22. V

It is evident that the cylindrical portions 15 of the tooth members willhave their points of tangency on the pitch circle. While I prefer tohave a very small clearance between the teeth for flexibility, ease inassembling, and for taking up slight inaccuracies of the machine, it isevident that these may, if desired, be of such diameters that noclearance whatever is left between them and they may all be in contactentirely around. the gear. It will be noted that the body portions ofthe tooth members separate at a small angle from the point of tangency.If a very small total clearance is provided, when the gear is inoperation the tooth members will pivotabout the pins 16a very slightamount, that is, until by their'pivoting action-thepitch circle has beensufliciently reduced in diameter to take up the clearance and cause allthe cylindrical portions to be in contact. When this condition isreached, it is evident that the entire gear will act as if rigid andallthe pins 16 will cooperate in taking up the stress of the load. Theangles between thebody 9 portions from the point of tangency are suchthatthe clearance which is left between the tooth members will be takenup before the pivoting about the pins 16 is enough to place the same inshear. From the foregoing, it

will be evident that the total power which each tooth is capable oftransmitting is determined by the strength of the cylindrical portionwhich projects beyond the body portion in the case of the gear, and bythe 00 I 69, of all suchzo'circles lying on the cireumfera enceffiof asing'leg large circle, the; center of strength of the tooth engagingportion of the pinions.

While I have illustrated the preferred embodiment of my invention, IWish it understood that I am not limited to the details of suchillustration but may carry out my invention in various forms ithin thescope of the appended claims;

Having'thus described my "invention, What I claim is 1. A'gearingassembly comprisinggagear and a pinion, said gear including acircumferentially grooved disk, tooth members pivoted at one end in thegroove of said disk, each of said tootl'r members having a cylindricalportion extending laterally therefrom, alternate said cylindricalmembers extending in opposite directions.

" -A assembly comprising a gear and a plnron, said gearincluding acircumrer nti'al'ly grooved disk, tooth members pivoted at one end inthe groove of'said -disk, each1 of safid tooth members; havingcumferentially grooved disk,"tooth;members pivoted'at one end in thegroove ofsaid disk, each ofsai'dftooth members h'avmg' vcylindrical Iportion extending laterally therefrom, alternate said" "cylindricalmembers extending inopposite' directions, said tooth-pins rotatablymounted; in said flanges pinion including a spool having flanges, and

- and extending inwardly, said tooth-pins beof tho's'e on the'opposingflange. 45,,

ing staggered'imthej'opposite flanges, and the ends thereof being spacedfrom the ends [4L Agearing assembly comprls ng. a gear and a pinio'msaidgearrincluding a circumferentia'lly groovedv disk,-'tooth memberscylindrical therefrom, alternate said cylindrical mem pivoted atoneendin' the groove, of said disk, each ofsaidjtoo'th. members having{portion extenfding' laterally bers extending in opposite directions,said pinion lricluding a spool ha'ving flanges, and

recur-pins rotatably mount'e din said flanges 1 and extending inwardly,said tooth pins be ing" staggered n the' opposite' flanges, the

' projections of said tooth pins" on: a plane perpendicular win-err axesconstituting: a" complete r ng; of; tangent circles, the centers whichis on; the axis? OfwSFkld; spoolf-m 15.; A'wgearin'g assembly comprisinga gear and, a EllllOl'l said gear, includingv a circumferentrally.grooved disk, tooth memberspivoted at one end in the groove of saiddisk, each of said tooth members having a cylindrical portion extendinglaterally therefrom, alternate said cylindrical members extendingin'opposite directions, said pinion including a spool having flanges,and tooth-pins rotatably mountedin said flanges and extending inwardly,said tooth-pins be ing staggeredin the opposite flanges, and the endsthereof being spaced from the ends of those on theopposing flange, theprojec tions of said tooth pins on a plane perpendicular to their axesconstituting a complete ring of tangent circles, the centers of all suchcircles lying on the circumference of a singlelarge circle, the centerof which ison the axis of said spool;

6.. .A gearing assembly comprising a gear and 'a pinion, said pinionincludingfa spool having flanges, and toothrpins rotatably mounted insaid. flanges and extending inwardly, said tooth-pins being staggered inthe opposite flanges.

TIA gearing assembly comprising afgear and a pinion, saidpinion'including. a'spool having flanges, and tooth-pins" rotatablymounted insaidflangesand extending in- Wardl'y, said. toothpins beingstaggered in the opposite'flanges, thexprojections of said tooth pins ona plane perpendicular to their axes constituting a. complete ring oftangent oircles,the centersof all such'circles lying. on thecircumference orasingle' largecircle, the center of which, is" ontheaxis of said spool 7 K p 8. A gearing assembly comprising a gear and.a pinion, saidi'gear, including a circumferenti-allly grooved disk,tooth members pivoted in the groove of said disk and. each comprising a.body portion! of. a. thickness to fit snuglyi'into. said groove and acylindrical. portion, extending. laterally therefrom, alternatesaidcylindrical, membersfextending in opposite directions, saidlpiiiionincluding. a spool having flanges, and, tooth.- pins rotatably mountedin. saidflanges. and extending inwardly,.. said toothrpi'ns. beingstaggeredv in the opposite flanges and the ends thereof. being. spacedfromgthe ends of those a on. the opposing. flange V a. distance greater"than the. thickness of' said body zgortiOnQ f I 9: A gearingassemblycomprisinga gear and. a; pinion, said, gear including acircumferentially grooved disk,tooth members. pivoted in the; groove ofsaid disk and each comprising a. body 7 portion'of a. thickness to fitsnugly into said groove and a cylindrical portion extending. laterallytherefrom, alternate. said cylindrical, members extending in oppositedirections, said pinion including a, spool lr 1avingflanges, and.tooth-pins rotatably mounted in. said; fiangesfand extendinginwardlysaid: tooth-pinsrb'eing staggered in the opposite flanges, andends-thereof being spaced from the ends of those 011' the opposingflange a distance greater than the thickness of said body portion, theprojections of said tooth pins on a plane perpendicular to their axesconstituting a complete ring of tangent circles,-the centers of all suchcircles lying on the circumference of a single large circle, the centerof which is on the axis of said spool.

In testimony whereof, I hereunto aflix my signature.

ARNOLD RUETSGHI.

